The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 1977
Filed:
Mar. 17, 1976
Takahiro Yamada, Hitachi, JA;
Tetsuo Doi, Hitachi, JA;
Hitachi, Ltd., , JA;
Abstract
In an apparatus of the type wherein ink under pressure is applied to a nozzle which is vibrated so that the ink emitted from the nozzle thereafter breaks up into ink drops which are charged in a charging tunnel in response to a video signal, means are provided, in accordance with this invention, for compensating the amount of charge on each ink drop or the strength of the deflecting field action on the ink drop, on the basis of information from a detecting means which detects the amount of deflection of one or more calibrating drops periodically so that the amount of deflection of the drop of writing fluid for a given charge may be held to a predetermined value.